26 Oct
2012
26 Oct
'12
4:24 p.m.
Hi Tomasz,
On Wed, Oct 10, 2012 at 7:46 AM, Tomasz Stanislawski t.stanislaws@samsung.com wrote:
This patch introduces usage of dma_map_sg to map memory behind a userspace pointer to a device as dma-contiguous mapping.
Perhaps I'm missing something, but I don't understand the purpose of this patch. If the device can do DMA SG, why use videobuf2-dma-contig and not videobuf2-dma-sg? What would be the difference design-wise between them if this patch is merged?
--
Best regards,
Pawel Osciak